Lamp-burner.



No. 645,340. Patented Mar. l3, I900.

W. E. THOMPSON.

LAMP BURNER.

(Application filed Jan. 2, 1900.) (N b I o d a I a'vwewto o.

Qxli tvmwey %f I u: Ncnms vmns co. PHOTO-LITHO, WASNINGTON n c UNITED STATES PATENT Orricne' WILLIAM ERWIN THOMPSON, OF NEVADA, MISSOURI.

LAM P-BURNER.

STEGIFICATION forming part of Letters Patent No. 645,340, dated March 13, 19.00.

Application filed January 2, 1900- Serial No. 111. (No model.)

To all whom it may concern:

Be it known that I, WILLIAM ER'WIN THOMPSON, a citizen of the United States, residing at Nevada, in the county of Vernon and State of Missouri, have invented certain new and useful Improvements in Lamp Burners; and I do declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to the letters of reference marked thereon, which form a part of this specification.

This invention relates to new and useful improvements in lamp-burners, and especially to a burner adapted for use in connection with railway-lanterns, switch-targets, signallights, &c., in which a perfectly-smokeless flame is produced by making the bottom of the burner air-tight, the draft being directed through oppositely-disposed apertures in the cap, thus forming a suction drawing the smoke and gases to the spaces in the bottom of the burner, whence they are consumed and not allowed to escape into the atmosphere.

To these ends and to such others as the invention may pertain the same consists, further, in the novel construction, combination, and adaptation of parts, as will be hereinafter more fully described and then speciflcallydefined in the appended claim.

My invention is clearly illustrated in the accompanying drawings, which, with the letters of reference marked thereon, form a part of this application, and in which drawings similar letters of reference indicate like parts throughout the several views, in which.

Figure 1 is a perspective view of my improved lamp-burner. Fig. 2 is a sectional view vertically and centrally through the burner. Fig. 3 is a detail view of the outer cap removed from the burner. Fig. 4c is a detail view of the inner cap, which is adapted to be fitted over the burner.

Reference now being had to the details of the drawings by letter, A designates the burner, which is designed to be screwed to the neck of the oil-fonnt and is provided with a wick-tube A, through the walls of which the spur-wheels for raising and lowering the wick pass, said wheels being mounted on the turning shaft, which is journaled in the usual manner in the burner. The bottom of the burner is imperforate about the wick-tube, and mounted upon the upper flanged edge of the burner is the cap D, which has an elongated slot D, about which is a vertical flange E. This elongated aperture is substantially of the shape of the wick-tube, but is of larger size than the latter, so that when the cap is placed over the burner a slight space will intervene between the outer circumference or periphery of the wick-tube and the inner wall of the flange E. When this capD is adjusted in place upon the burner, the upper end of the flange E should extend a slight distance above the upper end of the wick-tube, as shown. The said cap D is converted and has two elongated apertures F F,which are parallel to each other and one on each side of the central flanged aperture. These apertures F are cut through the cap in the convexed surface thereof, as will be observed, and the air for the purposes of combustion is designed to pass down through said apertures to the bottom of the burner and thence allowed to pass up through the flanged and elongated aperture of the cap before coming into contact with the wick at the seat of the flame. A second cap K is provided, which has a convex surface and an elongated aperture K therein, which aperture when adjusted in place to the burner is in registration with the flanged aperture in the cap D, the ends of the aperture K being nearly over the ends of the flanged aperture in cap D. On

opposite sides of the aperture K and in the convex surface of the cap K are the two elongated apertures N N, parallel to each other, and the upper margin of each aperture N being below the upper end of the flange of the cap D. This capK is held to the flange of the cap D by means of an integral tongue k,which passes through an aperture in the flange of the cap D, while the free swinging portion of the cap K has a recess therein which is adapted to spring over a lug R on the flange of the cap D.

In a burner constructed in accordance with my invention it will be noted that the bottom of the burner being air-tight the air for the purposes of combustion is required to enter the apertures N, N, thence being drawn through the elongated apertures F F, and thence passture with an upright flange about same, and

two elongated apertures on opposite sides 15 of said central aperture, the cap K, having an elongated aperture registering with the flanged aperture in capD,opposite1y-disposed elongated apertures N, N, in the convexed surface of the cap K, arranged substantially as shown and for the purpose set forth.

In testimony whereof I affix my signature in presence of two witnesses.

WILLIAM ERVVIN THOMPSON.

\Vitnesses:

A. W. REED, ALICE BRAHAM. 

